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PHP | SplObjectStorage offsetUnset() Function

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  • Last Updated : 07 Sep, 2022
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The SplObjectStorage::offsetUnset() function is an inbuilt function in PHP which is used to set the object from the storage. Syntax:

void SplObjectStorage::offsetUnset( $object )

Parameters: This function accepts a single parameter $object which specifies the to be unset. Return Value: This function does not return any value. Below programs illustrate the SplObjectStorage::offsetUnset() function in PHP: Program 1: 

php




<?php
 
// Create an empty SplObjectStorage
$str = new SplObjectStorage;
$obj = new StdClass;
 
// Set offset $obj to $str
$str->attach($obj, "GeeksforGeeks");
 
// Print Result before
var_dump(count($str));
 
// Unset object from storage
$str->offsetUnset($obj);
 
// Print Result after
var_dump(count($str));
 
?>

Output:

int(1)
int(0)

Program 2: 

php




<?php
 
// Create an Empty SplObjectStorage
$str = new SplObjectStorage();
  
$obj1 = new StdClass;
$obj2 = new StdClass;
$obj3 = new StdClass;
$obj4 = new StdClass;
  
$str->attach($obj1, "GeeksforGeeks");
$str->attach($obj2, "GFG");
$str->attach($obj3);
$str->attach($obj4, "DSA");
  
// Print Result before
var_dump(count($str));
 
// Unset object from storage
$str->offsetUnset($obj1);
$str->offsetUnset($obj2);
$str->offsetUnset($obj3);
$str->offsetUnset($obj4);
 
 
// Print Result after
var_dump(count($str));
?>

Output:

int(4)
int(0)

Reference: https://www.php.net/manual/en/splobjectstorage.offsetunset.php


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